I just finished to implement a full Corsair Hydro X watercooling system. I have two issues with my Commander Pro:

- I plugged the Corsair XD5 to the CoPro on fan port 6 (temperature cable on port 1). The pump is not detected in iCUE, only 5 fans are shown (my 5 LL120). The 6th fan port is not displayed and the pump run really slowly.
- The USB header on CoPro seems to not work: I plugged my power supply (HX1200i) on CoPro and it is not detected in iCUE. If I plug the power supply USB cable on motherboard, its work.

Hey ... I can't say for the HydroX pump but ... one thing to look out for with the Commander Pro's USB ports is that it's super-easy to have them off by one. If that's not the case ... there are also sometimes issues specifically with AMD boards. Crazily enough, it seems that putting an internal USB hub between the AMD USB port and the Commander Pro fixes things. But before you do that, try disabling Fast Boot in your BIOS and Windows Fast Startup (https://www.windowscentral.com/how-d...0-fast-startup). Both of these bypass some USB device initialization and that can also cause problems (and not just with Corsair devices).

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I'll try to disable Windows Fast Boot but the fast boot on motherboard is already disabled. Regarding the pump, I tried all combination: Auto, 3-Pin, 4-Pin. In Auto and 3-Pin, the fan channel is not shown and the pump runs slowly. In 4-pin, the pump runs at the maximum speed and iCUE indicates me 0 RPM even after choosing the Hydro X pump profile.

Just for giggles - what happens if you put the pump on a different port on the CoPro? One with a working fan?

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This comment is provided "as-is", without warranty of any kind, express or implied, including, but not limited to, the sanity or mental fitness of the author. The author is not a Corsair employee, does not represent Corsair, and no comment should be construed as an official statement from Corsair.

It does seem strange you don’t get a speed reading on any C-Pro port but the fans do register on the same headers. It’s just a tachometer and PWM wire and it should show speed. It does register on the motherboard so the tach wire seems ok. We’re you able to change speed with the BIOS?

I don't know. A bug or glitch with iCUE could affect the lighting or presets, but this information would be sent across the USB channel. The pump only send a tachometer and PWM control wire to the Commander Pro. It doesn't know what is on the other end, just that something is there and it is moving. While reservoir materials and design vary quite a bit, the D5 pump is pretty consistent. I have been running a D5 pump from another brand for two years on my Commander Pro header #6 and it has never done this or glitched in anyway. I don't really understand this at all. I do know the Hydro X team is aware.

Did you try moving one of the other case fans from headers 1-5 over to #6, just to verify header #6 does recognize something?

I don't know. A bug or glitch with iCUE could affect the lighting or presets, but this information would be sent across the USB channel. The pump only send a tachometer and PWM control wire to the Commander Pro. It doesn't know what is on the other end, just that something is there and it is moving. While reservoir materials and design vary quite a bit, the D5 pump is pretty consistent. I have been running a D5 pump from another brand for two years on my Commander Pro header #6 and it has never done this or glitched in anyway. I don't really understand this at all. I do know the Hydro X team is aware.

Did you try moving one of the other case fans from headers 1-5 over to #6, just to verify header #6 does recognize something?

Yes I tried on all fan ports. When I set on Auto the pump stop to run. When I set to 4-Pin, I have 0RPM even though the pump is running.

Right. The problem is each of those PWM LL fans also has a tach and PWM wire in the same place. The controller should not care what's on the other end. If there is a controller issue, it should be the same result for all of them when on #6 or the pump should be read on a different header if the #6 header is the defective. Your problem looks like a tach wire issue on the pump, except that it is then read and controlled through the motherboard header. Not really sure what to suggest at this point since the troubleshooting is leading us in circles --- aside from continuing to use the motherboard as the control source.

Right. The problem is each of those PWM LL fans also has a tach and PWM wire in the same place. The controller should not care what's on the other end. If there is a controller issue, it should be the same result for all of them when on #6 or the pump should be read on a different header if the #6 header is the defective. Your problem looks like a tach wire issue on the pump, except that it is then read and controlled through the motherboard header. Not really sure what to suggest at this point since the troubleshooting is leading us in circles --- aside from continuing to use the motherboard as the control source.

This evening I tried to plug it on the motherboard again. This time, the motherboard also doesn't show me RPM. But the motherboard change the pump speed in function of CPU temperature. It's really strange ...

This evening I tried to plug it on the motherboard again. This time, the motherboard also doesn't show me RPM. But the motherboard change the pump speed in function of CPU temperature. It's really strange ...

Sounds like something is going on with the pump. I would get a hold of Corsair support for a RMA on that pump.